31 dic 1876 anni - The phonautograph

Descrizione:

was the earliest known device for the recording sound. The phonautograph was invented by a Frenchman Édouard-Léon Scott de Martinville. It took the vibrations from the tube to imprint on smoke-blackened paper or glass. By mid-April 1877 Charles Cros had realized that a phonautograph recording could be converted back into sound by Photoengraving then tracing into a metal surface to create a playable groove, then using a stylus and diaphragm to recreate sound.

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